Granted Patent
Utility
US 6,401,507 · App. 09/997,369
Hydroforming, in-die hydropiercing and slug-ejecting method and apparatus
Inventors:
Glenn M. Krcek, Romuald Gmurowski, Bruce S. Shimanovski, Mircea M. Ghiran
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Nov 30, 2001
Inventors
Glenn M. Krcek
Romuald Gmurowski
Bruce S. Shimanovski
Mircea M. Ghiran
Assignee (at issue)
General Motors LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.